<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:th="http://www.thymeleaf.org"
>
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="/login" method="post">
    <input type="hidden" th:value="${_csrf.token}" name="_csrf"
           th:if="${_csrf}"/>
    用户名：<input type="text" name="username"/><br/>
    密码：<input type="password" name="password"/><br/>
    <input type="submit" value="登录"/>
</form>
</body>
</html>